A diaper

(57) Summary book invention about the diaper which has a front portion (12), a back portion (14), and a middle crotch part (13), The above-mentioned middle crotch part contains the absorber unit (1) joined to the fluid permeability top sheet (9) which approaches a wearer's body at the time of a fluid impermeable bottom sheet (7) and use, and is located, Moreover, the opening (15) located in the back portion and crotch part of a diaper and the elastic equipment (20, 21) with which it was equipped in the state of extension are included, The above-mentioned top sheet is not attached to an absorber at least in the zone of the above-mentioned opening (15), but the above-mentioned absorber unit (1) includes the main part (2) which equipped the each side with 脚凹所, and two side part objects (3, 4) arranged on both the outsides of a main part by each side part and each 脚凹所 in the side. According to the present invention, an absorber unit (1) is 包被 (ed) between a bottom sheet (7) and the inner direction casing sheet (8) made from fluid permeability material, Both the above-mentioned sheets are the portions which support at least the elastic element (10, 11) which is the following portion, i. E. , the portion located in the outside of an absorber, and, with which it was equipped in the state of extension along each side edge within the central portion of a diaper, It is joined mutually, and as for; each side part object (3, 4), the side approached and located in each 脚凹所 of a main part (2) has an arc edge in (22), ; side part object is estranged from a main part (2), and the method casing sheet of the inside of; (8) is joined to a bottom sheet (7) in the crevice formed in 脚凹所 between a main part and a side part object.